NMTCB PET PRACTICE QUESTIONS #1
WITH ACCURATE ANSWERS
Quantitative bias that refers to the underestimation of counts density which
differs from what they should be is called:
(A) Motion artifact
(B) Partial-volume effect
(C) Recovery coef fi cient
(D) Truncation artifact - ANSWER-(B) Partial-volume effect
Truncation artifacts in PET/CT imaging are produced by:
(A) Contrast medium
(B) Difference in size of FOV between PET and the CT
(C) Difference in scanning time between PET and the CT
(D) Beds overlapping - ANSWER-(B) Difference in size of FOV between PET and the
CT
Property of PET detectors that allows them faster timing signals for coincidence
detection and to work at high count rates is called:
(A) The stopping power
(B) Energy resolution
(C) The decay constant
(D) The light output - ANSWER-(C) The decay constant
The first PET radiopharmaceutical to receive the U.S. Food and Drug
Administration approval in 1989 was:
(A) Rb-82
(B) F-18 Fluoride
(C) F-18 FDG
(D) N-13 ammonia - ANSWER-(A) Rb-82
The dose calibrator quality control procedure performed to assess the device's
ability to measure accurately a range of a low to high activities is called:
(A) Geometry
(B) Accuracy
(C) Linearity
(D) Constancy - ANSWER-(C) Linearity
The earliest disposal of the decay-in-storage waste material is permitted if it
was held for a minimum 10 half-lives and has decayed to less than:
(A) Background level
, (B) Two times background levels
(C) 0.05 mR/h
(D) 0.5 mR/h - ANSWER-(B) Two times background levels
The recommended time interval for PET imaging after biopsy is:
(A) 1 week
(B) 2-4 weeks
(C) 2-6 months
(D) > 6 months - ANSWER-(A) 1 week
The example of the anatomic diagnostic modality employed in the work-up of
the patient with seizures is:
(A) Electroencephalography (EEG)
(B) Positron emission tomography (PET)
(C) Magnetic resonance imaging (MRI)
(D) Single-photon emission computed tomography (SPECT) - ANSWER-(C) Magnetic
resonance imaging (MRI)
The following positron-emitting radionuclides are isotopes of natural elements present in
most biochemical processes EXCEPT:
(A) O-15
(B) F-18
(C) C-11
(D) N-13 - ANSWER-(B) F-18
Two photons arising from the same annihilation event and detected by two
detectors within the coincidence time-window are:
(A) True coincidences
(B) Random events
(C) Scatter coincidences
(D) Single events - ANSWER-(A) True coincidences
Positronium (Ps) is an arrangement of:
(A) Two positrons
(B) Two electrons
(C) An electron and a positron
(D) A positron and a neutrino - ANSWER-(C) An electron and a positron
The combined whole-body effective dose for a clinically diagnostic PET/CT is
typically in the range:
(A) <10 mSv
(B) 10-20 mSv
(C) 20-30 mSv
(D) >30 mSv - ANSWER-(C) 20-30 mSv
The positron has the same mass as an electron and an electric charge of:
WITH ACCURATE ANSWERS
Quantitative bias that refers to the underestimation of counts density which
differs from what they should be is called:
(A) Motion artifact
(B) Partial-volume effect
(C) Recovery coef fi cient
(D) Truncation artifact - ANSWER-(B) Partial-volume effect
Truncation artifacts in PET/CT imaging are produced by:
(A) Contrast medium
(B) Difference in size of FOV between PET and the CT
(C) Difference in scanning time between PET and the CT
(D) Beds overlapping - ANSWER-(B) Difference in size of FOV between PET and the
CT
Property of PET detectors that allows them faster timing signals for coincidence
detection and to work at high count rates is called:
(A) The stopping power
(B) Energy resolution
(C) The decay constant
(D) The light output - ANSWER-(C) The decay constant
The first PET radiopharmaceutical to receive the U.S. Food and Drug
Administration approval in 1989 was:
(A) Rb-82
(B) F-18 Fluoride
(C) F-18 FDG
(D) N-13 ammonia - ANSWER-(A) Rb-82
The dose calibrator quality control procedure performed to assess the device's
ability to measure accurately a range of a low to high activities is called:
(A) Geometry
(B) Accuracy
(C) Linearity
(D) Constancy - ANSWER-(C) Linearity
The earliest disposal of the decay-in-storage waste material is permitted if it
was held for a minimum 10 half-lives and has decayed to less than:
(A) Background level
, (B) Two times background levels
(C) 0.05 mR/h
(D) 0.5 mR/h - ANSWER-(B) Two times background levels
The recommended time interval for PET imaging after biopsy is:
(A) 1 week
(B) 2-4 weeks
(C) 2-6 months
(D) > 6 months - ANSWER-(A) 1 week
The example of the anatomic diagnostic modality employed in the work-up of
the patient with seizures is:
(A) Electroencephalography (EEG)
(B) Positron emission tomography (PET)
(C) Magnetic resonance imaging (MRI)
(D) Single-photon emission computed tomography (SPECT) - ANSWER-(C) Magnetic
resonance imaging (MRI)
The following positron-emitting radionuclides are isotopes of natural elements present in
most biochemical processes EXCEPT:
(A) O-15
(B) F-18
(C) C-11
(D) N-13 - ANSWER-(B) F-18
Two photons arising from the same annihilation event and detected by two
detectors within the coincidence time-window are:
(A) True coincidences
(B) Random events
(C) Scatter coincidences
(D) Single events - ANSWER-(A) True coincidences
Positronium (Ps) is an arrangement of:
(A) Two positrons
(B) Two electrons
(C) An electron and a positron
(D) A positron and a neutrino - ANSWER-(C) An electron and a positron
The combined whole-body effective dose for a clinically diagnostic PET/CT is
typically in the range:
(A) <10 mSv
(B) 10-20 mSv
(C) 20-30 mSv
(D) >30 mSv - ANSWER-(C) 20-30 mSv
The positron has the same mass as an electron and an electric charge of:
